Vibratory converter.



0; M. LEIGH.

VIBRATORY CONVERTER.

APPLICATION FILED MAY 19. 1911.

1,291,942. Patented Jan. 21,1919.

2 SHEETS-SHEET l.

0. M. LEIGH.

VIBRATORY CONVERTER. APPLICATION FILED MAY 19. I917.

Patented Jan; 21, 1919.

2 SHEETS-SHEET 2.

OSCAR M. LEIGH, OF GENOA, ILLINOIS, ASSIGNOR T0 GENOA, ILLINOIS.

VIBRATORY CONVERTER.

Specification of Letters Patent.

Patented Jan. 21, 1919.

Original application filed September 28, 1915, Serial No. 52,995. Divided and this application filed May 19,

To all whom it may concern:

l 3e it known that I, OSCAR M. LEIGH, a citizen of the United States, residing at concise, and exact description, reference be mg had to the accompanylng dr'awmgs, forming a part of thls specificatio y invention relates to vibratory con-.

verters, and has for its object the provision of an improved converter of this kind which is an improvement more particularly of my co-pending application filed March 24, 1915. y invention contemplates in its general form the provision of a mechanism which can be supplied with alternating current, change this alternating current into uni-directional current, and then modify this uni-directional current into an alternating current of a different fre quency than the impressed alternating current.

My invention is particularly'designed for use in connection with twin vibrators for use in transforming alternating current into pulsating current. IVhen using but one vibrator in connection with instrumentalities such as this and as shown in my copending application Serial No. 16,564. a differentially wound transformer is required as set forth in said co-pending application. To avoid the use of this differentially wound transformer I utilize twin vibrators so that an ordinary style of transformer can be used, thus extremely simplifying the construction and making the operation more uniform.

I find that I am enabled to obtain very effective results by using a pair of twin vibrators for rectifying purposes and then operating a" pole changer in connection therewith, this pole changer cooperating with a transformer and a winding in bridge of the source of supply to furnish the required current of the desired frequency.

In a specific form in which my invention finds much application. such as providing ringing mechanism for telephone exchanges, this mechanism may be directly connected to the commercial form of alternating cur- S erial No. 16,564,

Serial No. 169,637.

rent, and will transform this current into alternating current of a suitable frequency for ringing purposes.

y invention herein is a divisional application of my prior application Serial N 0. 52,995, filed Sept. 28, 1915. In my said parent application, as disclosed herein but the claims are directed not to the systemas a whole, but to certain means by virtue of which I amenabled to successfully operate electromagnetic means for controlling synchronously operated twin contact elements. 4

n my present application, the claims are drawn to the system as a whole by virtue of which the device transforms alternating current of a given frequency to alternating current of a different fundamental frequency. i"

In my'co-pending application Serial No. 52,996, I show a system of the acter disclosed herein which h is provided wit means whereby the outgoing current may be either of the alternating or pulsating current character.

In my copending application Serial No. 98,265, a system similar to the one disclosed herein is illustrated. which'however is combined with an equalizer battery and means to efi'ect its proper coordination in the cir cuit. In illustrating my invention I have chosen this particular form, and it is this particular form I will now describe in corn nection with the accompanying drawings illustrating such form, in which .Figure 1 is a front view of a vibratory converter constructed in accordance with my invention, and.

I show a system suchgeneral char- Fig. 2 sets forth the circuit arrangements.

Referring more particularly to Fig. 2, I show a source of alternating current 1 which is led through fuses 2 by means of the switch bars 3 and 3? to terminals 12and 14. To terminal 12 is connected terminal 4 of the impedance coil Ghand terminallt is connected, to terminal 5 of the impedance coil 6,

' ing post 4 .clrcuit extends from the ,bind bymeans of the conductor to one terminal 8 of a vibrator 9, the current then extending through .the coils of said-vibratorby means .of conductor 10, throughthe coils of the twin vibrator 11, condenser 13, con= ductor 15, conductor 16, conductor 60, to the terminal 14. Twin vibrators 9 and 11 are thus also connected directly across the circuit from the generator 1. These twin vibrators 9 and 11 vibrate their armatures and consequently the arms 18 and 19 respec means of the conductor 24, which then ex- 1 by means of conductor 29 to the contact terminal 30. f We thus have at the contact terminals 28 and'30 are then connected by means of concircumstances a tends by way of conductor 7 to the terminal 4, which is one side of the impressed circuit. The contacts 21 and 22 are connected together by means of a conductor 25, and this conductor 25 is connected by the conductor 17 to the terminal 5 which represents the other side of the impressed circuit. conductor 17 has a resistance 26 included in circuit therewith.

the operation of twin vibrators that at times there may be some inequalities in the oper ation of the arms 18 and 19, these arms'momentarily being out of step, thus making a momentary Wrongful contact. Under these destroy the instrument. The resistance 26 serves the purpose of protecting both of the twin vibrators. The arm 18 is connected.

by means of conductor 27 vwiththe contact;

terminal 28, and thearm 19 is connected and a uni-directional current as the arms "18 and 19 vibrate in accordance with the frequency of the impressed current, and thus keep theterminals 28 and 30 positive and negative respectively. These terminals28 ductors 31 and 32 respectively to the contact posts '33 and 34. These contact posts are in association with spring contacts 35, 35, carried by a vibrating rod 36 which is operable by the electromagnet 37 of the vibrator 38. The arms are connected together and extend by means of conductor 39 to one terminal of a primary winding 40 of the trans former 41, the other terminal of this pri-v mary winding being connected by means of conductor 42 with a central point 43 of the impedance winding 6. The circuit throughthe'transformer. winding 40 can be traced from the central point 43 of the impedance winding 6 by wayof conductor 42, winding 40, conductor 39', contact v34 (alternately contact 33), conductor 32, binding post 30, vibratory element 19, and. then to either of larly, when contact 33 in the opposite The i It has been found in too large flow of currentv would cause the welding of. the contacts and hating current. 11 serve to control the actuations a great as shown in Fig. 1,

the contact elements-22 or 23 whichever happens at that time to have a negative tl'lIOhgh this path, current of a given polarity passes through the transformer wmdmg 40 whenever contact 34 is in circuit. Simiis in circuit, current the transformer winding 40 passes through direction.

to smooth out the wave, and the terminals of the secondary winding are bridged by the condenser 49 for a similar purpose. The

vibrator 33 has a contact spring 50 which cooperates with the stationary contact 51. The current to operate the vibrator 38 1S furnished-from the'main circuit supplied by the generator 1, and can be traced from the binding post 4, via conductor 7, conductor 52, arm 36, contact elements 50 and 51, conductor 53,. coils 37, conductor 54, condenser 55, conductor 16, to the terminal 14. Whenever the arm 36 is attracted and circuit through the elements 50 and 51 broken, circuit is not entirely broken through the coils 37 as they are still included with the resistance 56, but that does not energize them sufficiently to prevent retraction of the armature 36. y r

The lamp 26 it will be seen is directly in circuit and preventsdifliculty even if the machine does not operate properly a temporary variation in the positions of the elements '18 and 19. I am thus enabled to obtain an alternating current of a modified frequency from that of the impressed alter- The twin vibrators 9 and deal better than. if a rent to attam the best "results.

' The parts mentioned in :this connection are all mounted on a suitable base plate 57 the fuse and switch devices being mounted upon a switch base 58. The remaining parts can be readily identified. It will be seen that a self-condue to Thus we have alternating current established in the primary winding 40 of a frequency corresponding ti:

The terminals of the primary winding 40 are bridged bythe condenser 48' the single vibrator with a plurality of contacts isused, as the elements 5 18 an'd19 must readilymespond to'the ourtained panel including all of the elements rangement, but wish of course'to contemplate the arrangement wherein that -'coil might be the secondary of a transformer bridged across the" source, as being clearly its equivalent. It, will be seen from what has been describedfthat the vibrators 9 and 11 through their vibratory elements 18 and- 19 close a circuit for the consumption circuit, which circuit includes the contact elements of the vibrator 38 and which also in- Winding 6. All of the three vibrators thus cooperate to complete the circui v As. already stated, the system herein disclosed is an improvement over that disclosed in my application Serial No. in that I avoid the use of a double primary transformer.

16,564, wound It is always difficult to accurately construct transformer windings the actuations-of th in parallel in such manner that the effects of each winding will be exactly the same as theeflects of the other winding. In order to avoid the use of a double wound transformer, an alternative may be the provision of a duplicate number of contacts controlled by the pole changer vibrator 38 or doubling the contacts of the rectifier vibrators; How'- ever, I find that it is extremely difiicult on account of the high frequency of alternating current which is utilized to accurately place a plurality of contacts so that a maximum amount of waves can be at all times utilized. On account of the extreme rapidity of move ment of the vibratory elements, they will operate most effectively with theleast num bGI OfCOIItEIOlIS that can be used.- I find, therefore, that by using twin vibrators so that their elements 18 and 19 are maintained at opposite polarities, that is, one positive and the other negative, that I can use a pole changer vibrator with but two contacts such as the contacts 33 and 34.

In this case, the rectifier have but two contacts respectively, of their The pole changer vibrator therefore receives its current directly from the vibratory elements 18 and 19 and rectified current, the pole changer vibrator vibrators also oppositely disposed,

It will be noted that cuit, which in reality winding 41, is directly the'consumption ciris the transformer controlled through and rectifying vibrator contacts in series. In saying that the transformer winding 41 isinrealitythe consumption circuit in so. far as that term is used in the claims, it will vibratoryg elements.

as that represents a sald consumption-circuit.

e pole changer contacts described be apparent that the consumption circuit shown by the conductors L, G, H is directly connected to the secondary winding -14 of the transformer 40 so as to inductively associate the consumption circuit with the circuit of the vibrators for special purposes not germane to the system herein concerned. y the use of the single primary winding the secondary winding may be divided to form different styles of sub-consumption circuits as shown, and as readily apparent. In the claims I will refer to the vibrators 9 and 11 as rectifying vibrators and the vibrator 38 as the pole changer vibrator in order to prevent confusion inthe terminology.

F rom what has been described the nature of my invention will be readily clear to those skilled in the art, and it will also be clear that my invention is susceptible of modifications with'n the scope of the ap- H pended claims.

, pole changer vibrator,

current supplied by by sald rectifier v1- wherebythe fundamental frequencyof-the current in said consumption circuit is dependent upon the frequency of vibration of said pole changer. vibrator..

2. A frequency changer of the character described comprising a source of. alternating current, a 'pair of rectifier vibrators vibrating in synchronism with the alternations of, the alternating current supplied by said source, a pole changer vibrator, animpedance winding associated with said source of current, a. consumption circuit extending from a central portion. of said impedance winding and jointly controlled by said rectifier vibrators and said pole changer vibrator, whereby the fundamental frequency of the current in said consumption circuit changer vibrator, and a transformer-w ose is dependent upon 'the frequency of vibration of' said ole having its continuity .con-

primary winding is included serially with 3. A frequency changer of-wthe' character comprising a source of alternatmg current, a brating in sychronisin with the alternations of the alternating current source,'a pole changer vibrator, an impedsupplied by said pair of rectifier vibrators viwinding and ance winding associated with said source of current, and a consumption circuit extending from a central portion of said impedance winding and having its continuity conjointly controlled by said rectifier vibrators and said pole changer vibrator, whereby the fundamenal frequency of the current in said consumption circuit is dependent upon the frequency of vibration of said pole changer vibrator, said rectifier vibrators each having a pair of contacts associated respectively with the opposite sides of said source of alternating current together with the cooperating contacts, there being-relative motion between each of said cooperating contacts and their associated contacts synchronously with the alternations of the alternating current in said source.

4. A frequency changer of the character described comprising a source ofalternating current, a pair of rectifier vibrators vibrating in synchronism with the alternations of the alternating current supplied by said source, a pole changer vibrator, an impedance winding associated with said source of current, a consumption circuit'extending from a central portion of said impedance having its continuity conjointly controlled by said rectifier vibrators and said pole changer vibrator, whereby thefundamental' frequency of the current in said consumption circuit is dependent upon the frequency of vibration of said pole changer vibrator, and a transformer whose primary winding is included serially with said consumption circuit, said rectifier vibrators eachhaving a-pair of contacts associated respectively with the opposite sides of said source of alternating current together with the cooperating contacts, there being relative motion between each of said cooperating contacts and their associated contacts sychronously with the alternations of the alternating current in said source.

5. A frequency changer of the character described comprising a source of alternating current, a pair of rectifier vibrators vibrating in synchronism with the alternations of the alternating current supplied by said source, a pole'changer vibrator, an impedance winding associated with said source of current, and a consumption circuit extending winding and having its continuit' conjointly controlled by said rectifier vi rators and said pole changer vibrator, fundamental frequency of. the current in said consumption circuit is dependent upon the frequency of vibration of said pole changer vibrator, said rectifier vibrators each having a pair of contacts associated respectively with the opposite sides-of said source of alternating current together With'the' cooperating contacts,

therebeing relative motion between each of said cooperating con alternating current in said source,

.cluded in the consumptioncircult.

from a central portion of said impedance whereby the 'tory element,

ance winding associated with said source of current, a consumption circuit extending from a central portion of said lmpedance winding and having its continuity conjointly controlled by said rectifier vibrators and said-pole changer vibrator,whereby the fundamental frequency of the current in said consumption circuit is dependent upon the frequency of vibration of said pole changer vibrator, and a transformer whose primary winding is included serially with said consumption circuit, said rectifier vibrators each havin a pair of contacts associated respective y with the opposite sides of said source of alternating current together with the cooperating contacts, there being relative motion between each of said cooperatin contacts and their associated contacts sync ronously with the alternations of the said pole changer vibrator having cooperating movable contacts, said contacts and the contacts of said rectifier vibrators being serially in- 7 A frequency changer of the described'comprising a source of alternating current, a pair of rectifier vibrators vibrating'in synchronism with the alternations of the alternatlng current supplied by said character source,'each of said vibrators having corresponding movable and stationary contacts,

connections whereby the correspondingcontacts of said vibrators are maintained at opposite polarities, a pole changer vibrator,

and aconsumption circuit having its continuity conjointly controlled by sa1d rectifier vibrators and said pole changer vibrators. 8. A frequency changer of the character described comprising a source of alternating current, a pair of rectifier vibrators vibrating in synchronism with the alternations of the alternating current supplied by said source, each rectifier vibrator having a vibrathe vibratory elements of said rectifier vibrators'being respectively of opposite polarities, a p0le changer vibrator, and

a consumption circuit havingits continuity conjointlylcontrolled by said rectifier vibrators and said pole changer vibrators' 9. A frequency current, av pa1r of rectifier vibrators vibratchanger of the character described comprising a source of alternating .and a transformer whose secondary winding is adapted to supplya consumption circuit 10 and Whose single primary winding lras its circuit continuity conjointly controlled by said rectifier vibrators and said pole changer vibrator.

In witness whereof, I hereunto subscribe my name this 11th day of May, A. D., 1917. 15

OSCAR M. LEIGH.

\Vitnesses HAZEL A. JONES, MAX W. ZABEL. 

